Millimeter-wave network analysis using nonlinear transmission lines

We report systems for network measurements at millimeter-wave frequencies. Active probes are used for on-wafer measurements to approximately 150 GHz. The active probes incorporate monolithic GaAs mm-wave network analysis circuits (comprising a nonlinear transmission line stimulus signal generator and a directional sampling circuit) and low-loss, rugged quartz coplanar-waveguide probe tips. Wideband transmitter and receiver integrated circuits interfaced to frequency-independent antennas, are used for free-space transmission measurements to approximately 250 GHz.<
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